Question

If a gas exerts 812 torr of pressure at a volume of 31 liters and the temperature of 30 degrees C, how many moles of gas are in the container?

Answer 1

1.35 moles

Step-by-step explanation:

Assuming the gas is ideal, we can solve this problem by using the following equation:

• PV = nRT

Where:

• P = 812 torr ⇒ 812 / 760 = 1.08 atm

• V = 31 L

• n = ?

• R = 0.082 atm·L·mol⁻¹·K⁻¹

• T = 30 °C ⇒ 30 + 273.16 = 303.16 K

We input the data:

• 1.08 atm * 31 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 303.16 K

And solve for n:

• n = 1.35 mol